Image converter
Convert a photo or graphic between PNG, JPEG, WebP and AVIF.
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About this tool
Turn one image into another format — a PNG screenshot into a JPEG for email, a photo into WebP for a web page, an old BMP into something modern software will open. Pick the format, set the quality if it is a lossy one, and compare the before and after size before you save. The tool checks first that your browser can genuinely write the format you chose, so you never end up with a file whose name and contents disagree, and it says plainly when a conversion will cost you transparency or make the file bigger.
Using this tool
Which format should I pick?
JPEG for photographs that must open anywhere. PNG for screenshots, logos, diagrams and anything needing transparency. WebP when you control where the image is used and want roughly a quarter off the JPEG size at the same quality. AVIF is smaller still but slower to make and not readable everywhere.
Why is WebP or AVIF missing from the list?
Because this browser cannot write it. Support is tested when the page loads rather than assumed, since a browser asked for a format it does not support quietly returns a PNG instead — which is how people end up with a .webp file that no WebP reader will open.
Why does my PNG lose its transparency as a JPEG?
JPEG has no alpha channel at all, so transparent areas have to be filled with something. You choose the fill colour here; white matches what most other software does silently.
Can it open HEIC photos from an iPhone?
Export the photo as JPEG or PNG first. This tool requires dimensions that can be checked before decoding and does not accept HEIC input.
Is there a size limit?
Twenty megabytes and sixteen megapixels. A decoded image needs four bytes per pixel whatever the file compressed to, so a larger one would exhaust the memory this browser tab is allowed and stop the page rather than finish. Oversized files are refused with the numbers, up front.
Where is the image processed?
In this page, by your browser. The file is read from your disk into the tab and never sent anywhere; you can watch the network tab and see no request while it converts.
Tool activity
Simple tools for everyday work.
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